PRKDC and ovarian cancer: Investigating ATM/DNA-PKcs/ATR protein together we found that tumours that have high ATM/DNA-PKcs/ATR protein expression have poor ovarian cancer specific survival (p = 0.000252) (Fig. 3a) and progression free survival (p = 0.001) (Fig. 3b) compared to tumours that are low ATM/DNA-PKcs/ATR protein expressers.